作　　者： ; ; ;

机构地区： 大连轻工业学院

出　　处： 《化工学报》 2004年第2期325-327,共3页

摘　　要： The effect of oleates as emulsifiers on graft copolymerization of starch with acrylamide (AM) and acrylic acid (AA) in the inverse emulsion system is studied in this paper .The effect of the kinds of emulsifiers, the proportion of mixed emulsifiers, the dosage of emulsifiers as well as the preparation methods of water-in-oil emulsion on monomer conversion, grafting ratio, and specific viscidity is discussed. The result indicates that calcium oleate or magnesium oleate as the emulsifier is better than sodium oleate or potassium oleate, and the mixture of oleic acid and its salt is better than any single compound.It is also concluded that monomer conversion reaches 99.7% and grafting ratio reaches 98.4% when m(oleic acid)/m(oleate sodium) is 60/40,m(starch)/m(monomers) is 1/1(among the monomers m(AM)/m(AA) is 4/1),v(oil phase)/v(water phase) is 1.2/1, initiator concentration is 2.4×10 -4mol·L -1,reaction temperature is 45～50℃,and reaction time is 6 hours.When mixed emulsifers concentration is 6%, the intrinsic viscidity reaches 1100ml·g -1. The effect of oleates as emulsifiers on graft copolymerization of starch with acrylamide (AM) and acrylic acid (AA) in the inverse emulsion system is studied in this paper. The effect of the kinds of emulsifiers, the proportion of mixed emulsifiers, the dosage of emulsifiers as well as the preparation methods of water-in-oil emulsion on monomer conversion, grafting ratio, and specific viscidity are discussed. The result indicates that calcium oleate or magnesium oleate as the emulsifier is better than sodium oleate or potassium oleate, and the mixture of oleic acid and its salt are better than any single compound. It is also concluded that monomer conversion reaches 99.7% and grafting ratio reaches 98.4% when m(oleic acid)/m(oleate sodium) is 60/40, m(starch)/m(monomers) is 1/1 (among the monomers m(AM)/m(AA) is 4/1), v(oil phase)/v(water phase) is 1.2/1, initiator concentration is 2.4×10-4 mol·L-1, reaction temperature is 45-50°C, and reaction time is 6 hours. When mixed emulsifers concentration is 6%, the intrinsic viscidity reaches 1100 mi·g-1.

关 键 词： 油酸盐 淀粉 丙烯酰胺 丙烯酸 接枝共聚 反相乳液

领　　域： [化学工程]